Electric regulation



J. CREVELING.

I ELECTRIC REGULATION, APPLICATION FILED NOV. 10, ms. RENEWED SEPT. 17. 1921.

,417,14=3. Patented May 23, 1922,

Q I I'IU'I" a v a INVENTOR.

U ITED STATES PATENT oral-cs.

JOHN L. oimvnnme, or warm name, New YORK, ASSIGNOR 'ro sour-n coo-mm.

COMPANY, A CORPORATION OF NEW YORK.

ELECTRIC REGULATION.

T 0 all whom it may concern:

Be it known that I, JoHN L. CnnvnmNe, a citizen of the United States, residing in White Plains, county of Westchester, and State of New York, have invented certain new and useful Improvements in Electric- Regulations, of which the following is a description. k

My lnvention pertains to that class of electric regulation wherein it is desired to regulate a dynamo or generator in a predeter-- mined manner, andhas for a particular object to provide means whereby the same will be automatically regulated within narrow limits.

As my invention is particularly applicable to systems employing a generator to charge a storage battery and operate lamps or other translating devices in conjunction therewith, and wherein the generator is subject to variations in speed, it will be described with reference .to such a. system.

In the drawing, Fig. l is a diagrammatic representation of one type of such system chosen to illustrate one embodiment of my invention; and

v Fig. 2 is a diagrammatic representation of a modification which may be made in the system of Fig. 1;

In the drawing, 1 represents a dynamo or generator the positive terminal of which is connected as by lead 2 with the positive side of the storage battery 3 and lamps or other translating devices 4-. The battery and translating deviceshave their negative.

terminals connected with the wire 5, carried to one terminal of the switch 6, the opposite terminal of which is connected as by lead 7 with one end of the coil or solenoid 8, the

opposite end of whichis connected as by lead 9 with the negative side of the generator. The generator is provided with field energizing means, in this instance indicated as a shunt coil 10 having in series therewith a suitable regulating resistance indicated as a carbon pile 11. It will therefore be obvious that the operation of the generator may be regulated by proper manipulation of the pressure and consequent resistance of the 6.0

pile 11. 12 is astud or pivot supporting a T-headed lever having vertical arms 13 v and 14; and the horizontal arm 15. The arm 13' bearsagainst one end of the pile 11 and controls the pressure thereupon, the other end of the said pile being confined by the Specification of Letters Patent. Patented May 23,- 1922, Application filed November 10, 1916, Serial No. 130,555. Renewed September 17, 1921. Serial No. 501,428.

to swing the lever 1314.-15 in a counter clockwise direction about the pivot 12.' 21 is a dashpot restraining too sudden move ment of thesaid lever, and 22 is an adjustable spring tending to draw the lever 15 downwardly so as to revolve the same in a clockwise direction to increase the pressure upon the pile 11. The free extremity of the lever 15, which is preferably made of nonmagnetic material of light weight, as for example aluminum, is provided with an iron rod or-keeper 23, pivotally' connected therewith and normally drawn outwardly against the sheave or roller 24: as by the light leaf spring 25. 26 is an electromagnet which when energized attracts the keeper 23 and firmly holds the same. The wire 27 is carried from the lead 2 to one end of the solenoid 20 and to the adjustable contact screw 28. The opposite end of the coil20 is connected as by wire 29 with one end of the winding of the coil 26 and with the adjustable contact screw 30. The remaining end of the coil 26 is connected as by wire 31 with one end of the resistance 32, the o .posite end of which is connected with the lead 9. 3l.is also connected with the contact lever 33 normally resting upon the contact screw 28, in which position the said lever 33 and its. connections through screw 28 serve to short-circuit the solenoid 20 and the electromagnet 26. And as I wind the said coils with fine wire, theyv will be practically deenergized when shunted out or short-circuited by the lever 33 but no large current will be consumed inasmuch as the resistance 32 is considerable and in series at all times with these circuits. Therefore' when the lever 33 rests upon the screw 28, coil 20 will not exert any appreciable pull upon the core 17 and pile 11 will be tightlycompressed throughlthe action of spring 22 drawing the out of contact with 28, the short-circuit around coils 20 and 26 will be broken and current will fiow through the said coils. 20

.will attract the core 17 and tend to swing the lever 14- 1315 in a counter-clockwise direction so as to relieve, the pressure upon the pile 11, but will be prevented from doing 7 so by coil 26 which will be energized simultaresistance 11 until restrained, as foi' example by breaking the circuit at 30-33, which will energize coil 26 and cause the keeper 23 to be attracted so as to hold the lever mechanism in a fixed position, or by bringing lever 33" into contact with 28, when both 20 and 26 will be short-circuited and spring 22 will exert the maximum pressure upon the pile 11. 4'1 is"a fine Winding or coil in shunt across a part of the system upon which it is desired to limit the voltage impressed by the generator, and which in this instance is indicated as the generator main circuit. The

coil 41 is provided with a coreof iron or other magnetic material 34 and when ener gized tends to lift the same smoothly against discharge from the battery through the genby the storage battery in a well known manthe action of the dashpot arrangement 39 cooperating with the end ofthe core.- The core 34 is provided with a stem of non-magnetic material 35 which enga es the contact lever '33 when core 34: is su ciently raised; And I so adjust the weight. of the core 34:

"and theresistance' 40 in serieswith the coil 41 that'when the maximum desired volta e across the generator is reached coil 41 w1ll lift its core 34-intocontact with lever 33. The coil 8 is provided-with a core 36 sir lilar to the core 34 and, provided with a similar (dashpot arrangement, and adapted when! raised to'operate the lever 33 in a -similar manner. 37 is an adjustable. resistance in shunt across'the coil]8 for the purpose of adjwitin the operation of-the-same.

I I1 cate like'parts, and the only modification intended to be brought out is the coil 38 shown used in place of the. coil 8 of Fig. 1' in in series with the battery circuit, which may series with the generator circuit. The switch 6 may be ofany suitable type,

and f1 prefer. to use one of the usual automatic' switches which will close its circuit when the voltage of the generator is substantially equal to thatof the storage battery and open the circuit whenthe generator voltage fa ls very slightly below that of the battery, in such manner as to prevent back bring 33 into contact with 30'again, or falls ig.-2 like numerals ;are used to indiner. If the generator have its voltage brought up until slightly in excess of that of the batter' switch 6 will close and the generator wil supply current to the battery and translating devices, which current will returnthrough the coil 8 and tend to lift the core 36. If the generator voltage be brought up until the generator delivers the maximum desired current, I'so adjust the resistance 37 that coil 8 will lift the core 36 smoothly against the action of its suitable dashpot intocontact with the lever 33 and open the contact at 33-28, which will break the short-circuit around solenoid 20 and magnet 26 and cause the same to be energized. Then if the current tends to rise, coil 8 will cause core 36 to further lift lever 33 and bring the same into contact with the screw 30 which will short-circuit the electromagnet 26 and cause the same to release its armature 23, and coil 20 will instantly start to move the lever 15 smoothly against the action of dashpot 21 to increase the resiste ance of the pile 11 and cut down the generv tor field until the current is at the normsi and core -36 sinks sufficiently to allow the lever 33 to break connection with the contact screw 30, and vthus, by breaking the short" circuit around 26, cause the same to in.- stantly attract and hold its keeper 23 and. prevent further movement of the lever 15 or change in the resistance 11, unless the current either rises sufficiently to cause 36 to Sufiiciently that 36 descends until 33 contacts with 28, which first action would further increase the resistance in the generator field and hold the current from exceedin its desired maximum, and which secon action would decrease the resistance in the field and tend to bring the generator current back to its normal stren th. And, therefore, it will be noted that coil 8 and its cooperatin .parts .will tend to cause the current supplie to the 129 system to remain constant. If at any time t e voltage. upon the system tends to .in- I crease above its desired limit for which proper adjustments have been made,,coi1l- 41 will raise the core 34, and by cooperating with the lever 33 operate in a mannersu'bstantially identical with the current coil in controlling the enerator to prevent-the maximum desire voltage frombeing-exceeded. And thus the current inthe circuit, 130

, cient, which is a very desirable type of regulation for use in systems of this character, chosen for illustration- An operation of that modification shown in Fig. 2 is substantially the same as that outlined. above, with the exception that it is the current in the battery circuit that is limited by the coil 38, instead of the generator current that is limited by the coil 8 in Fig. 1.

I do not wish in any way to limit myself to any of the exact constructions or details of operation given above to illustrate one embodiment of my invention, for it will be. obvious that wide departure may be made witholl t gleparting from the spirit and scope thereof. a

What I- claim is:

' 1. Means for regulating agenerator comprehending a regulating element, means for operating said element normally tending to increase the output of the generator, means for stopping and permitting the operation thereof, and electromagnetic means governing the operating means.

2. Means for regulating a generator comprehending a regulating element, means for operating said elementnormally tending to increase the output of the generator, means forstopping and permitting the operation thereof, and electromagnetic'means governing the stopping and permitting means.

3. Means for regulating a generator comprehending a regulating element, means for operating said element normally tending to increase the output of the generator? means for stopping and permitting the operation thereof, and electromagnetic means governing the operating and stopping and permitting means. 4, Means for regulating a generator comprehending a regulating. element, means for pperating said element normally tending to 1ncrease-the output of the generator, means for stopping and permitting theoperation thereof, and electromagneticmeans governing the operating means responsive to. current fluctuations.

5. Means for re ulating a generator comprehending a regu ating element, means for operating said element normally tending to for stoppin increase the output of the generator, means and permitting the operation thereofian electromagnetic means governing the stopping andpermitting means re sponsive to current fluctuations.

.- 6. Means for re 'lating a generator comprehending a re 15 ating element, means for operating said e ement,normally tending to increase the. output of the generator, means ting for stoppin and permitting the operation thereof, an electromagnetic means govern-' ing the operating and stopping and permitting means responsive to current fluctuations.

7. Means for regulating a generator comprehending a regulating element, means for operating said element normally tending to increase the output of the generator, means for stopping and permitting the operation thereof, and electromagnetic means governing the operating means responsive to voltage fluctuations.

8. Means for regulating a generator comprehending a regulating element, means for operating said element normally tending to 10. Means for regulating a generator com-- prehending a re ulating element, means for operating said e ement normally tending to increase the output of the generator, means for arresting the operation thereof, and electromagnetic means governing the operating means responsive to current and" voltage fluctuations. 0

11. Means for re latin a generator comprehending a regu ating e ement, means for operating said element normally tending to increase theoutput of the generator, means for arresting theoperation thereof, and elec- IlOO tromagnetic means governing the arresting means responsive-to current and. voltage fluctuations- Means for re ulating a generator comprehending a regufizting element, means for operating said element normally tending to increase the outputvof the generator, means for arresting the'operation thereof, and electromagnetic means governing the operating and arresting means responsive tofcurrent v and voltage fluctuations.

13. The combination with a generator and a regulating element for afiecting the same, of means for operating the 'said element to increase the activity of the generator, means for operating said element to decrease the activity of the generator, means ior controlling the-lfieration of ,both said. operating means, a, device controlling said controllingmeans, and electromagnetic means controlling said device indrapendently responsive-to voltageandcurrent uctuations.

operate said element to decreasetheresist ance thereof, means for controlling said lastnamed means, electromagnetic means for operating the element to. increase the resistance thereof, circuit changing means for controllin' said electromagnetic means and said contro ling means, voltage responsive means for operating said circult changing means, and

current responsive means for operating said circuit changing means.

16. The combination with a variable speed generator and storage battery charged thereby, of means for regulating the generator to limit the current and voltage thereof comprehending a carbon pile, electromagnetic means causinthe pressure upon said ile to be varied an controlling means there r operating upon ehanges in electrical connections thereof, and means for changin the said connections-affected by voltage an current fluctuations.

17 3 Means for re 7 lating a generator comprehe'nding a regu ating element, mechanical means normally tending to operate said element to increase the output of the genera tor, electromagnetic means arresting and permitting operation of said mechanical means, and electromagnetic'means operating said element to decerase the output of the generator combined with means for affecting the electromagnetic operating means and the stopping and permittin means in response to voltage and current uctuations whereby voltage and current in a circuit supplied by the generator may be held from exceeding predetermined limits.

JOHN L. CREVELING. 

